AS16569 — DMZ

AS16569 announces 2 IPv4 prefixes covering 512 addresses and 0 IPv6 prefixes.

About this network

The AS handle is not a name at all. It is the security term for the part of a network exposed to outsiders.

What it's used for

• A city government's network. Two IPv4 prefixes announced from Canada, no IPv6, five hundred and twelve addresses, through three observed BGP neighbours.

Notable

• The AS handle is three letters naming a demilitarised zone: the segment a network puts between itself and the internet. It says what the number carries, not who runs it.
• Both netnames repeat that: the city's initials, the same three letters, and then the block's own address written with hyphens.
• The two blocks sit on unrelated ranges and are the entire holding, both registered to the city itself.
• One of six queried addresses answered, with a single word naming a violent weather system, on the city's public domain.
• Three observed neighbours carry two blocks.

Interesting

• Naming an AS number after the function of the addresses inside it is rare and useful. Most handles say who; this one says what, and anybody reading the routing table learns that these addresses are the outward-facing ones by design.
• Repeating the same three letters in every netname turns the whole record into one statement: this is the edge, and nothing behind it is here.
• A single host name on a city network, and it is a weather word. Municipal machines get named by people, not by generators, and the naming survives every reorganisation that renames the department.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 192.41.148.0/24
• 198.160.191.0/24

Upstream networks

• AS6939 Hurricane Electric LLC
• AS6461 Zayo Bandwidth
• AS15296 Cybera Inc

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS6461 Zayo Bandwidth
• AS15296 Cybera Inc

Internet exchanges

• YYCIX Calgary Internet Exchange — Calgary, Canada